Means for transmitting power



(No Model.)

B. P. AUTENRIETH.

MEANS FOR TRANSMITTING POWER.

Patented Dec. 11, 1888.

N4 PETERS. Pholu-Lillwgrapher, WuhingtolLD. C.

UNITED STATES PATENT OFFICE.

ERNST F. AUTENRIETH, OF NEW YORK, ASSIGNOR TO THE GLEN COVE MACHINECOMPANY, (LIMITED,) OF BROOKLYN, (GREEN POINT,) NEIV YORK.

MEANS FOR TRANSMITTING POWER.

SPECIFICATION forming part of Letters Patent No. 394,323, dated December11, 1888. Application filed August 30,1888. Serial No. 284,175. (Nomodel.)

To all whom it may concern..-

Be it known that I, ERNST F. AUTENRIETH, of the city and county of NewYork, in the State of New York, have invented a new and usefulImprovement in Means for Transmitting Motive Power, of which thefollowing a specification.

I will describe my improvement in detail, and then point out the novelfeatures in claims.

In the accompanying drawings, Figure 1 is a side elevation of a portionof a planingmachine to which my improvement is attached, and showing aportion of a frame to which the same attached. Fig. 2 is aplan or topview of the same.

Similar letters of reference designate corresponding parts in both thefigures.

A designates a main shaft, which shaft may derive motion in any suitablemanner. B designates a pulley keyed upon the main shaft.

O designates a driving-belt passing about the pulley B, and also aboutan expansionpulley, I), mounted upon a shaft, D. The expansion-pulley I)comprises a frame, D of circular form. The frame I) is provided with tangentiall y-exten ding slots D of which I have shown four. These slotsform guideways for segments 1) of the expansion-pulley proper. Thesegments 1) are adapted to be moved nearer to or farther from the axisof the pulley along said guideways. The outer edges of the segments Dare arc-shaped, and are grooved to receive the belt C.

The inner ends of the segments D have pix otally connected to them linksor rods (7. These links or rods extend rearwardly from theexpansion-pulley, approximately in line with the direction of movementof the seg ments D", or, in other words, tangential to the axis ofrotation of the pulley. At their outer ends the links or rods arepivotally connected to a sleeve or collar, E. The sleeve rotates withthe shaft, its rotation being due to a feather, (Z, on the shaft D,which enters a suitable groove in the collar. The said sleeve or collarhas a circumferential groove, E, and a yoke, F, is received within saidgroove. Pivotally connected at one of its ends to said yoke is abell-crank lever, G, fulcrumed upon a projection j, extending from aframe of a machine or other support. Pivotally connected to the otherarm of the bell-crank lever G is one end of a slider-rod, H. Theslider-rod H is adapted to slide through a guide, g.

Rigidly secured upon the slider-rod H is a toothed rack, H. The toothedrack engages a sector, I, which sector constitutes one arm of abell-crank lever, I, fulcrumed upon a stud, 2', extending from the frameof a ma chine or other support. The other arm, 1 of the lever, as shown,has in it a curved or offset portion, c, and then extends beneath andfor some distance beyond the fulcrum of the lever. Upon the arm I of thelever is a sliding weight, .I. The curved or offset portion e of the armI to enable the weight J to be moved into a position directly beneaththe fulcrum of the lever, in which posit-ion it is neutral. \Vhen,however, it is moved outwardly along the arm 1 it tends to rock thesector I in such manner as to cause a longitudinal movement of theslider-rod II in the direction of the arrow, Fig. 1, whereby thebe1l-crank lever G will be rocked to cause the movement of the collar Eaway from the expansion'pulley D. The segments D are thus moved nearerthe center of the pulley, and the diameter of the expansion-pulleyproper is accordingly decreased. This necessarily results in an increaseof speed of whatever machinery is driven from the shaft upon which theexpansio11-pulley is mounted proportionate to the degree of reduction indiameter of the expansion-pulley, for if the main shaft be driven at afixed speed and the pulley B be non-expansible it is apparent thatdecreased diameter of the expansion-pulley will result in increasedspeed of the latter pulley.

It may here be stated that the centrifugal force of the segments must besufficient to overcome the pullin -strain of the belt.

IVhen the operation of a machine is about to be started, the speed atwhich it is desired to run it is first determined. The weight J is thenmoved to the necessary position on the arm I of the lever I. The machinehaving been started, centrifugal force will operate to throw thesegments D outwardly until the diameter of the expansion-pulley is suchas to meet the desired requirements for speed, or until centrifugalforce and the power exerted by the weight J counterbalance each other.These two forces connterbalancing each other will maintain theexpansion-pulley at an approximately fixed diameter and the speedaccordingly uniform.

I have shown means for shifting the weight J, consisting in a cord orrope, f, connected at its ends to opposite sides of the weight andpassing about grooved pulleys f f mounted uponthe leverI, and also abouta pulley, f mounted upon the stud "i. The pulley f is provided with twocircumferential grooves, through one of which the cord or rope f passes.Motion is imparted to the pulley f by a cord or rope, f, passing aboutsaid pulley through the other of said grooves, and also about a groovedhand-wheel, f \Vhen the handwheel f is rotated, it will be readily seenthat the weight may be slid along on the arm I in either direction.

L designates a grooved wheel comprised in a belt-tightener. The wheel Lis mounted upon one arm, L, of a lever having a fulcrum, L and the otherarm, L of which forms a handle. This belt-tightener is thrown onto thebelt by hand to tighten it for starting the machine, and when it isthrown off the belt is entirely slack and does not drive. The tightenermay be secured in the last-mentioned position by springing thehandleinto a fixed catch, L

My improvement, although especially designed for use withplaning-machines, may be employed with any suitable machine.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is

1. The combination, with a driving-shaft, of a pulley on said shaft,another shaft, an expansion-pulley on said second-named shaft, a belt onsaid pulleys, a lever, and a counterbalance thereon, and connections andgearing, substantially as herein described, between said lever and theexpanding members of the expansion-pulley, whereby the saidcounterbalance is caused to act against the centrifugal force of saidexpanding members, substantially as herein described.

2. The combination, with a drivin g-shaft, A, a pulley, 13, on saidshaft, a second shaft, D, an expansion-pulley, I), on said second shaft,a belt passing about said pulleys, a lever, I, having a fixed fulcrumand comprising a sector, I, a counter-balance on said lever adapted tobe moved into different positions thereon, a toothed rack, H, gearingwith said sector, and a connection between the said rack and theexpanding members of said expansionpulley, substantially as specified.

ERNST F. AUTENRIETH.

itnesses:

FREDK. HAYNES, ARTHUR H. GUMBLIN.

